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One of the three carbon atoms that make up pyruvate is cleaved off by the rather large enzyme pyruvate dehydrogenase. This carbon atom attached to oxygen and becomes carbon dioxide(what you exhale). This reaction is known as a decarboxylation reaction. Then the other two remaining carbon atoms make up an acetyl group. Along with the acetyl group is hydrogen which will reduce NAD+ to NADH. The acetyl group is added to coenzyme a, and is called acetyl coenzyme a, or acetyl CoA for short. This is the ultimate creation of the oxidation of pyruvate. If there is a high concentration of ATP then the acetyl-CoA is used for fatty acid biosynthesis. If not than it will be used for oxidative metabolism. That's the basics of it for it is very complex.
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∙ 15y ago
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∙ 12y agoPyruvate is the end product of glycolysis whre glucose is broken down to form pyruvate. This pyruvate has two fate. In the presence of oxygen it enters Krebs cycle (aerobic respiration) and in the absence of oxygen it is oxidized into lactic acid (anaerobic respiration).
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∙ 14y agooxidation occurs when some matierals are expoesd to oxygen and water
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∙ 13y agoGlycolysis is the first step of respiration (both aerobic and anaerobic). Thus it begins whenever respiration begins.
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∙ 11y agoIn the matrix of the mitochondira.
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∙ 12y agoin the mitochondria
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∙ 11y agoinner membrane of mitochondria
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∙ 10y agoIn the mitochondria
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What molecules does the transition reaction begin with?
pyruvate
What happens immediately after pyruvate is into the mitochondrion?
Acetyl CoA forms.
What happens during glucolysis in cellular respiration?
glucose is changed into pyruvate
What happens after pyruvate is brought into the mitochondrion?
It is carried by specific transporters (the negative charge on pyruvate won't allow it to diffuse) before being acted on by pyruvate dehydrogenase. I don't think these transports are named.
How does the pyruvate produced by glycolysis enter the mitochondrion?
Pyruvate enters the Krebs cycle via an intermediate called acetyl CoA.Pyruvate is formed in the cytoplasm as the end product of glycolysis. Pyruvate enters a mitochondrion, in the matrix of which it encounters the enzyme pyruvate dehydrogenase. This enzyme catalyzes the reaction of pyruvate with coenzyme A to form acetyl CoA. This reaction is sometimes called the link reaction, as it links glycolysis to the Krebs cycle (= citric acid cycle, or tricarboxylic acid cycle)."Pyruvate dehydrogenase" is in fact a huge complex (bigger than a ribosome) consisting of three enzymes and a number of other substances, including coenzymes. In the course of the reaction NAD+ is reduced to NADH. A molecule of CO2 is also produced. So this reaction involves a both an oxidation and a decarboxylation.Acetyl CoA then reacts with oxaloacetate to form citrate. Both oxaloacetate and citrate are intermediates of the Krebs cycle.
What reaction is the Synthesis of pyruvate from glycogen?
Glycolysis.
What molecules does the transition reaction begin with?
pyruvate
Which enzyme(s) bypass the pyruvate kinase reaction of glycolysis in gluconeogenesis?
pyruvate carboxylase and phosphoenolpyruvate carboxykinase (PEPCK)
What type of reaction is phosphoenolpyruvate ADP to Pyruvate ATP?
Exergonic reaction
Glycolysis is best defined as a catabolic reaction based upon the?
two pyruvate
What happens immediately after pyruvate is into the mitochondrion?
Acetyl CoA forms.
What happens during glycolsis in cellular respiration?
glucose is changed into pyruvate
What happens during glucolysis in cellular respiration?
glucose is changed into pyruvate
Where does pyruvate processing occur?
Pyruvate processing occurs in the matrix of the mitochondria
Does thiamine play a role in citric acid cycle?
Thiamine (Vitamin B_1) is an important component of the pyruvate dehydrogenase complex--the enzyme complex which converts pyruvate to acetyl-CoA. This specific reaction is the "Link Reaction" which connects glycolysis and the citric acid cycle.
What happens after pyruvate is brought into the mitochondrion?
It is carried by specific transporters (the negative charge on pyruvate won't allow it to diffuse) before being acted on by pyruvate dehydrogenase. I don't think these transports are named.
Which part of cellualar respiration breaks down glucose into pyruvate?
The process of breaking down starch to pyruvate is glycolysis. This reaction takes place in one of the cell organelles - mitochondria.
